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Finding the Fourth Proportional to 80,920.82, 121,296.96 and 45,329.96

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Solution

The fourth proportional to 80,920.82, 121,296.96 and 45,329.96 is: 67,947.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,920.82 : 121,296.96 = 45,329.96 : x
  2. Step 2: Convert to fraction form
    80,920.82/121,296.96 = 45,329.96/x
  3. Step 3: Cross multiply
    80,920.82x = 121,296.96 × 45,329.96
  4. Step 4: Simplify right side
    80,920.82x = 5,498,386,648.16
  5. Step 5: Solve for x
    x = 5,498,386,648.16/80,920.82
  6. Step 6: Final answer
    x = 67,947.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.